At the beginning of 20th century, there was an active debate about random selection units versus purposive groups for survey samples. Neyman’s (1934) paper tilted balance strongly towards varieties probability sampling combined with design-based inference, and most national statistical offices have adopted this method their major surveys. However, nonprobability has remained in widespread use m...

We consider nonparametric regression estimation for finite population totals for two-stage sampling, in which complete auxiliary information is available for first-stage sampling units. The estimators, based on local polynomial regression, are linear combinations of cluster total estimators, with weights that are calibrated to known control totals. The estimators are asymptotically design-unbia...

The aim of this study is to determine knowledge, attitude and practice of Iranian households and health staff on nutrition at province level. The sampling method in NUTRIKAP survey for households in each province is single-stage cluster sampling and the size of clusters is equal. The sampling method for health staff in each province is stratified random sampling. Samples are selected from physi...

1.0 Introduction Replication variance estimation for a two-stage nested sample design is usually implemented by generating replicate samples (weights) that replicate the original first-stage sample selection. Since the second-stage is nested, the second-stage variance can be reflected by associating each second-stage unit with its respective first-stage unit in each firststage replicate sample....

AIMS To assess the prevalence of, and correlates of traumatic dental injuries among 12-year-old schoolchildren in Kerala. MATERIAL AND METHODS A cross-sectional, two-stage cluster sampling technique was used. The sample size included 838 12-year-old school children. Traumatic dental injuries to the anterior teeth were evaluated clinically by one examiner. Teeth examined were maxillary and man...

This study aims to determine the effect of product quality, brand image, and price on purchase decision cimory yogurt drink in Special Region Yogyakarta. The population this were people who had purchased consumed Cimory drink. sample was 100 respondents selected based predetermined criteria under probability sampling technique cluster (area) random sampling. data collection used is questionnair...

This cross-sectional study was performed in 2014 upon a sample consisting of 464 female students in Allame Tabatabaie University were selected based on a Morgan formula and multi-stage cluster random sampling. Then, participants responded to the questionnaires of body image disturbance of Reas and et al. (2002), perfectionism scale of Besharat (2004) and eating attitudes test of Garner and Garf...